Silent Threshold Encryption ePrint:2024/263

Rust implementation of the silent-threshold encryption introduced in ePrint:2024/263. Benchmarks reported in the paper were run on a 2019 MacBook Pro with a 2.4 GHz Intel Core i9 processor. The library has been confirmed to work with version 1.76.0 of the Rust compiler.

An end to end example is provided in the examples/ directory.

Dependencies

Install rust via:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Benchmarking

The library can be built using cargo build --release.

Use cargo bench to benchmark setup (KeyGen in the paper), encryption, and decryption. This is expected to take approximately 20 minutes. To run a specific benchmark, use cargo bench --bench <bench_name>.

Use cargo run --example endtoend to check correctness of the implementation.

The results are saved in the target/criterion directory. A concise HTML report is generated in target/criterion/index.html and can be viewed on a browser (Google Chrome recommended).

If you wish to benchmark for a different set of parameters, you can modify the files in the benches/ directory.

Unit Tests

Additionally, you can find individual unit tests at the end of the respective files in the src/ directory. These can be run using cargo test <test_name>. This will allow you to test the correctness of the implementation.

WARNING: This is an academic proof-of-concept prototype, and in particular has not received careful code review. This implementation is NOT ready for production use.

Overview

• src/setup: Contains an implementation for sampling public key pairs and aggregating keys of a chosen committee. Also contains the partial_decryption method which is essentially a BLS signature. Note that the get_pk method runs in quadratic time. This can be reduced to linear time by preprocessing commitments to lagrange polynomials.
• src/encryption: Contains an implementation of the encrypt method for the silent threshold encryption scheme.
• src/decryption: Contains an implementation of agg_dec which gathers partial decryptions and recovers the message.

License

This library is released under the MIT License.